The tile rules are:
An alliance member can now play one of his Action tokens on his own board to benefit another member of the alliance.
Guillaume clarified in another thread and summarised as:
My dear ally, you can now use this action. Use it according to your possibilities.
This is fine for normal actions but does this also work for special actions (that require a gold token)?
The other player (the "dear ally") would get the benefit of a power tile he does not own...
In concrete terms: if player A places a gold token, what would player B be allowed to do: a gold action from A's tiles or a gold action from B's tiles?